如何使用使用PHP的Java HttpClient库上传文件
如何使用使用PHP的Java HttpClient库上传文件
提问于 2018-03-23 07:58:26
我想编写Java应用程序，它将使用PHP将文件上传到Apache服务器。Java代码使用Jakarta HttpClient库4.0版beta2：
import java.io.File;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.FileEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.CoreProtocolPNames;
import org.apache.http.util.EntityUtils;
public class PostFile {
public static void main(String[] args) throws Exception {
HttpClient httpclient = new DefaultHttpClient();
httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
HttpPost httppost = new HttpPost("http://localhost:9002/upload.php");
File file = new File("c:/TRASH/zaba_1.jpg");
FileEntity reqEntity = new FileEntity(file, "binary/octet-stream");
httppost.setEntity(reqEntity);
reqEntity.setContentType("binary/octet-stream");
System.out.println("executing request " + httppost.getRequestLine());
HttpResponse response = httpclient.execute(httppost);
HttpEntity resEntity = response.getEntity();
System.out.println(response.getStatusLine());
if (resEntity != null) {
System.out.println(EntityUtils.toString(resEntity));
}
if (resEntity != null) {
resEntity.consumeContent();
}
httpclient.getConnectionManager().shutdown();
}
}
PHP文件upload.php非常简单：
<?php
if (is_uploaded_file($_FILES['userfile']['tmp_name'])) {
echo "File ". $_FILES['userfile']['name'] ." uploaded successfully.\n";
move_uploaded_file ($_FILES['userfile'] ['tmp_name'], $_FILES['userfile'] ['name']);
} else {
echo "Possible file upload attack: ";
echo "filename '". $_FILES['userfile']['tmp_name'] . "'.";
print_r($_FILES);
}
?>
读取响应我得到以下结果：
executing request POST http://localhost:9002/upload.php HTTP/1.1
HTTP/1.1 200 OK
Possible file upload attack: filename ''.
Array
(
)所以请求成功了，我能够与服务器通信，但是PHP没有注意到这个文件 - is_uploaded_file返回的方法false和$_FILES变量是空的。我不知道为什么会发生这种情况。我跟踪了HTTP响应和请求，它们看起来很好：
请求是：
POST /upload.php HTTP/1.1
Content-Length: 13091
Content-Type: binary/octet-stream
Host: localhost:9002
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.0-beta2 (java 1.5)
Expect: 100-Continue
˙Ř˙ŕ..... the rest of the binary file...和回应：
HTTP/1.1 100 Continue
HTTP/1.1 200 OK
Date: Wed, 01 Jul 2009 06:51:57 GMT
Server: Apache/2.2.8 (Win32) DAV/2 mod_ssl/2.2.8 OpenSSL/0.9.8g mod_autoindex_color PHP/5.2.5 mod_jk/1.2.26
X-Powered-By: PHP/5.2.5
Content-Length: 51
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html我正在使用xampp和远程Linux服务器在本地windows xp上测试这一点。我也尝试使用以前版本的HttpClient - 版本3.1 - 并且结果更加不清楚，is_uploaded_file返回false，但是$_FILES数组填充了正确的数据。
Stack Overflow用户
发布于 2018-03-23 16:05:14
好的，我使用的Java代码是错误的，来自正确的Java类：
import java.io.File;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.ContentBody;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.CoreProtocolPNames;
import org.apache.http.util.EntityUtils;
public class PostFile {
public static void main(String[] args) throws Exception {
HttpClient httpclient = new DefaultHttpClient();
httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
HttpPost httppost = new HttpPost("http://localhost:9001/upload.php");
File file = new File("c:/TRASH/zaba_1.jpg");
MultipartEntity mpEntity = new MultipartEntity();
ContentBody cbFile = new FileBody(file, "image/jpeg");
mpEntity.addPart("userfile", cbFile);
httppost.setEntity(mpEntity);
System.out.println("executing request " + httppost.getRequestLine());
HttpResponse response = httpclient.execute(httppost);
HttpEntity resEntity = response.getEntity();
System.out.println(response.getStatusLine());
if (resEntity != null) {
System.out.println(EntityUtils.toString(resEntity));
}
if (resEntity != null) {
resEntity.consumeContent();
}
httpclient.getConnectionManager().shutdown();
}
}
请注意使用MultipartEntity。
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原文链接：
https://stackoverflow.com/questions/-100007762
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